package com.mall.common.utils.security;

import com.mall.common.constant.PermissionConstants;
import com.mall.common.utils.MessageUtils;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import org.apache.commons.lang3.StringUtils;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.subject.Subject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * permission 工具类
 * Created by zhonglin on 2020/4/8.
 */
public class PermissionUtils {

  private static final Logger log = LoggerFactory.getLogger(PermissionUtils.class);

  /**
   * 查看数据的权限
   */
  public static final String VIEW_PERMISSION = "no.view.permission";

  /**
   * 创建数据的权限
   */
  public static final String CREATE_PERMISSION = "no.create.permission";

  /**
   * 修改数据的权限
   */
  public static final String UPDATE_PERMISSION = "no.update.permission";

  /**
   * 删除数据的权限
   */
  public static final String DELETE_PERMISSION = "no.delete.permission";

  /**
   * 导出数据的权限
   */
  public static final String EXPORT_PERMISSION = "no.export.permission";

  /**
   * 其他数据的权限
   */
  public static final String PERMISSION = "no.permission";

  /**
   * 权限错误消息提醒
   *
   * @param permissionsStr 错误信息
   *
   * @return 提示信息
   */
  public static String getMsg(String permissionsStr) {

    String permission = StringUtils.substringBetween(permissionsStr, "[", "]");
    String msg        = MessageUtils.message(PERMISSION, permission);
    if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.ADD_PERMISSION)) {
      msg = MessageUtils.message(CREATE_PERMISSION, permission);
    } else if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.EDIT_PERMISSION)) {
      msg = MessageUtils.message(UPDATE_PERMISSION, permission);
    } else if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.REMOVE_PERMISSION)) {
      msg = MessageUtils.message(DELETE_PERMISSION, permission);
    } else if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.EXPORT_PERMISSION)) {
      msg = MessageUtils.message(EXPORT_PERMISSION, permission);
    } else if (StringUtils.endsWithAny(permission,
                                       new String[]{PermissionConstants.VIEW_PERMISSION, PermissionConstants.LIST_PERMISSION})) {
      msg = MessageUtils.message(VIEW_PERMISSION, permission);
    }
    return msg;
  }

  /**
   * 返回用户属性值
   *
   * @param property 属性名称
   *
   * @return 用户属性值
   */
  public static Object getPrincipalProperty(String property) {

    Subject subject = SecurityUtils.getSubject();
    if (subject != null) {
      Object principal = subject.getPrincipal();
      try {
        BeanInfo bi = Introspector.getBeanInfo(principal.getClass());
        for (PropertyDescriptor pd : bi.getPropertyDescriptors()) {
          if (pd.getName()
                .equals(property) == true) {
            return pd.getReadMethod()
                     .invoke(principal, (Object[]) null);
          }
        }
      } catch (Exception e) {
        log.error("Error reading property [{}] from principal of type [{}]", property, principal.getClass()
                                                                                                .getName());
      }
    }
    return null;
  }

}
